I still think the rev9 has one of the best balances, but it depends on what you’re after:
Short config is 128-ish db, 9.7 oz, about 5.5” long. It seems any shorter and the noise level starts going up a lot.

3-lug capable, full auto rated, and the mod3 can handle a couple full power rounds at a time (300 and 5.56). Something to look at at least.